bipmkpw: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/bipmkpw - from package: bip

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/bipmkpw - from package: bip

You may install the required package with command apt-get install {package}

Error in other languages:
bipmkpw: bevel nie gevind nie
bipmkpw: comandă negăsită
bipmkpw: comando não encontrado
bipmkpw: commande introuvable
bipmkpw: command not found
bipmkpw: käsku ei ole
bipmkpw: không tìm thấy lệnh
bipmkpw: komanda nerasta
bipmkpw: Kommando nicht gefunden.
bipmkpw: kommandot finns inte
bipmkpw: komut yok
bipmkpw: nie znaleziono polecenia
bipmkpw: níor aimsíodh an t-ordú
bipmkpw: no se encontró la orden
bipmkpw: no s'ha trobat l'ordre
bipmkpw: opdracht niet gevonden
bipmkpw: parancs nem található
bipmkpw: perintah tidak ditemukan
bipmkpw: príkaz nenájdený
bipmkpw: příkaz nenalezen
bipmkpw: команда не найдена
bipmkpw: командата не е открита
bipmkpw: 命令找不到
bipmkpw: コマンドが見つかりません